Dear All thank you for your support I have done successfully these thing. Another thing on which i have stuck is recipe.For example i am using four registers of siemens PLC cpu 224 xp that are VD 716, VD 600 and so on the values are given through input via HMI. now i have to change the values everytime for each process. i want to make a page on hmi trough which i can just call the process number and values transfer to plc directly for each process and we can save new process. so that user can select from the saved process ??